Dependences of isospin fractionation degree on the mass and beam energy of a colliding system

CORC > 近代物理研究所 > 中国科学院近代物理研究所 > 近代物理研究所知识存储（2010之前）

	Dependences of isospin fractionation degree on the mass and beam energy of a colliding system
	Liu, JY ; Xing, YZ ; Guo, WJ
刊名	ACTA PHYSICA SINICA
	2004-10-01
卷号	53 期号:9 页码:3316-3320
关键词	isospin fractionation symmetry potential
ISSN号	1000-3290
英文摘要	Based on the isospin-dependent quantum molecular dynamics model, we have investigated the dependences of isospin fractionation degree (N/Z)(n)/(N/Z)(frag) on the mass and the beam energy of colliding system. The (N/Z)(n) and (N/Z)(frag) are the neutron proton ratio of the nucleon emission (gas phase) and that of the fragment emission (liquid phase) respectively. The isospin fractionation degree is a sensitive function to the mass and beam energy of the colliding system. The (N/Z)(n)/(N/Z)(frag) reduces with increasing mass of the colliding system when the beam energy and neutron proton ratio of the colliding system are fixed. This is due to the larger compression, small heating energy and larger critical temperature of the gas-liquid phase transition for the heavy colliding system, compared to those of the light colliding system. We also found that (N/Z)(n)/ (N/Z)(frag) enhances with increasing beam energy due to the increase of excitation energy of the colliding system which leads to larger nucleon transport and isospin fractionation. But the isospin fractionation only occurr in the energy region for producing the liquid-gas phase transition. In this case, we propose that (N/Z)(n)/(N/Z)(frag) can be directly compared with the experimental data to get the information about symmetry potential.
WOS关键词	HEAVY-ION COLLISIONS ; ENTRANCE CHANNEL DEPENDENCE ; NUCLEAR-EQUATION ; MULTIFRAGMENT PRODUCTION ; FRAGMENTATION ; FLOW ; STATE ; DISAPPEARANCE ; PROBE ; NONEQUILIBRIUM
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000224421300014
公开日期	2010-10-29
内容类型	期刊论文
源URL	[http://ir.imp.cas.cn/handle/113462/1249]
专题	近代物理研究所_近代物理研究所知识存储（2010之前）
通讯作者	Guo, WJ
作者单位	1.Tianshui Normal Univ, Inst Theory Modern Phys, Tianshui 741000, Peoples R China 2.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Liu, JY,Xing, YZ,Guo, WJ. Dependences of isospin fractionation degree on the mass and beam energy of a colliding system[J]. ACTA PHYSICA SINICA,2004,53(9):3316-3320.
APA	Liu, JY,Xing, YZ,&Guo, WJ.(2004).Dependences of isospin fractionation degree on the mass and beam energy of a colliding system.ACTA PHYSICA SINICA,53(9),3316-3320.
MLA	Liu, JY,et al."Dependences of isospin fractionation degree on the mass and beam energy of a colliding system".ACTA PHYSICA SINICA 53.9(2004):3316-3320.